A call from a distraught wife, and another from Lt. Murphy of the Chicago PD Special Investigation Unit makes Harry believe things are looking up, but they are about to get worse, much worse. Someone is harnessing immense supernatural forces to commit a series of grisly murders. Someone has violated the first law of magic: Thou Shalt Not Kill. Tracking that someone takes Harry into the dangerous underbelly of Chicago, from mobsters to vampires....

In a world scarred by an apocalyptic past, evoking a time both 2,000 years past and 2,000 years into the future, untold thousands gather for a crusade. Among them, two men and two women are ensnared by a mysterious traveler, Anasûrimbor Kellhus - part warrior, part philosopher, part sorcerous, charismatic presence - from lands long thought dead. The Darkness That Comes Before is a history of this great holy war, and like all histories, the survivors write its conclusion.

The Assassin: Surrounded by dark elves, Artemis Entreri tightens his grip on the streets of Calimport. While he urges caution, his black-skinned sponsor grows ever more ambitious. The assassin will soon find himself on a path his most hated enemy has walked before him - a path that leads to a place where someone like Entreri would never be welcome. The Drow: Jarlaxle has ascended from dark Menzoberranzan with only evil intentions. The malevolent Crystal Shard’s influence on him intensifies until even the drow agents he brought with him grow fearful.

They have always scared him in the past - the Rangers, with their dark cloaks and shadowy ways. The villagers believe the Rangers practice magic that makes them invisible to ordinary people. And now 15-year-old Will, always small for his age, has been chosen as a Ranger's apprentice. What he doesn't yet realize is that the Rangers are the protectors of the kingdom. Highly trained in the skills of battle and surveillance, they fight the battles before the battles reach the people. And as Will is about to learn, there is a large battle brewing.

After more than 500 years of exile, the heir to the empyre is wary about his sudden reassignment to active duty on the Goblin War’s front lines. His mission to rescue an outpost leads to a dead-end canyon deep inside enemy territory, and his suspicion turns to dread when he discovers the stronghold doesn't exist.